Telephone-exchange system.



1. L. MCQUABRIE. TELEPHONE EXCHANGE SYSTEM. I APPLICATION FILED OCT. 20,1917. Patented Mar. 25,1919.

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Mamas I $6 j #1 J. L. McQUARRiE.

TELEPHONE EXCHANGE SYSTEM.

APPLICATION FILED ocr. 20, 19!].

1,298,365, Patented Mar. 25, 1919.

V 2 SHEETS-SHEET 2.

,4 J. 5 w q if y //?'W 7 7 A //2 w nHii /n V0 721 Jd/WFS Z. A Quark/e- I hurrah STATES PATENT;

JAMES L. rceooannm, or monrcnara, NEW Jensen, AssIenon-ro 'WESTERN ntno'rnito coMrAnY, moonronarnn, or NEW YORK, N. Ln oonrone'rrorr or new YORK.

rntnrnonn-nxcnexren sysgcsxa I Specification of Letters Eatentl Pg tenfigfi E1331. 2.5,

Application filed cameras. 1am. semi No. 197.574.

change Systems, of which the following is a full, clear, concise, and exact description.

This invention relates to automatic switching apparatus for telephone exchange systems, and has for its object the provision of apparatus of this type which will be compact in structure, ei'licient in operation, and low in cost of production and maintenance.

ll switching mechanism made in accordance with this invention comprises in general a brush operating mechanism arranged to more contact brushes from their'normal position, in two separate directions in the same plane into engagement with contacts, one of the movements being rotary and the other radial. lhe contacts are arranged in groups in banks circumscribing the axis of rotation of the switch and are adapted to he engaged the brushes in their radial movement. That is, a brush set rotated to select a desired group and is then moy'ed radially to establish connection with a desired terminal set in the selected group. The panel contact banks may be multiple banks of the well-known type of construction, but instead of being multipled horizontally, the contacts are inultipled vertically.

In the drawings illustrating this invention,

Figure 1 is a plan View of the switch;

F '2 is a side elevation of the switch;

6, which is supported -hy a toothed wheel 9 rotatably mounted on a shaft 7 secured to a lrame 12. The brush carriage 6 has two slots, 11 and 12. The shaft 7 extends through the slot Atlillfdt slot ll (see Fig. 3) is provided in the toothed wheel 9,

through which a shaft 10 fixed to the brush carriage 6 extends. The" shaft and the stud guide the brush carriage in its radial movement.

A. toothed wheel 17 arranged to be rotated in a direction opposite to that of'toothed wheel 9 and having a plate lo secured 'thereto is. also'mounted rotatably on the shaft 7. A hub 21 is secured. to the toothed wheel-9. A collar 20,- keyed to .thehub 21 by means of a slot 22 and astud 23, is slidahle upon the hub 21 and rotates therewith. .The collar 20 is limited in its downward movement by a flange on the hub 21. The lower side of collar 20 has a cam surface and is engaged by two cam rollers26 and 26 )ivoted to two an le irons :27 and 27 fixed to plate 15 and locatedhpon opposite sides of the shaft 7. Return movement of the toothed wheel 9 is effected by means of a spring 24 fastened at one end to a pin 30 secured to the frame and at the other end to any convenient point on the wheel 9. An other function of the spring 24 is to hold the collar 20 in its lowermost position in the normal position of the switch. The downward pressure of the spring 24 upon the collar 20 in conjunction {with the rollers 26 and 26 provide a flexible connection between the toothed wheels 9 and 17, that is. when said rollers rest in the grooves in collar 20 the toothed wheels 9 and 17 rotate together and when said rollers rest upon the straight surface of collar 20 the wheel 17 may he ro tated alone.

In the first movement 0): the apparatus in response to impulses through the stepping magnet 42, the pawl 49 pivoted upon the armature ll will engage the toothed wheel 9 to rotate said toothed wheel, the brush carriage, the collar 20 and the toothed wheel 1? to a desired group of terminals. This ac tion tensions the spring 24. A pawl eel of a member 86 holds the toothed Wheel 9 in the selected position. At the. cessation of the rst series of impulses through the stepping magnet 42, a side switch .198 will be caused to operate, thus disconnecting magnet 42 from the stepping circuit, and bringing into service magnet 60. Magnet 60 has an armature 61 carrying a pawl 62 adapted to engage the toothed wheel 17. The plate '15 has ,for. shaft 10, secured at its upper end 2" portions of the collar 20.

an ecoentiicaiiy arranged rais d por'iion provided with a groove which acts as brush carriage When the toothed i is rotated and the toothed wheel 9 the resultant radial movement of aha the groove of the raised poi ion 15;, a i L a 510$ 11 in the toothed 9, iiiovos the brush carriage to advance the brushes into engagement with the desired tQi'l'Hiflfi i.

As stated heretofore, after the first ries of impulses has been sent, magn t connected in the circuit. In to impulses, magnet operates to rotate the toothed Wheel 17am the plate 15. The cam rollers 26 and 26 force the ooiiar upwardly, compressing ishe This upward movement of the collar 20 discosnects toothed Wheels 9 and 17 so that she rotation eithe latter does not mo e former. The rotation of toothed wheel 17 and plate 15, however, causes the brush carriage to be moved radiaiiy due to shaft 10 extending into the groove oi the raiseii portion 16, of the plate The first at-tree tion of the armature 61 of the magnet 60 moves the holding pawl of the magnet 71 by means of the arm 63 of the armature 61 into engagement with a tooth of the toothed Wheel 17. A spring; 7

a hoicis the pawl. in i3h1s position, thus prevent-nag backward movement of the toothed wheel 1?.

Restoration of the switch to normal posi tion is effected by magnet! 1 being eneigizeii. This attracts the pawl Y0, time toobheci Wheel 17. Toorhe Wheel 17, in moving back to normal position guide? action of the spiiiig l peimits the cam IOii are 2% and 26' to again enter he out The dovmwai movement of Celia? 2O permits 1 e beii or ievei' to be moved about its pivot 81, thus Withdrawing paw], 82 pivoted M w o from engagement with arm 84 said pa if hazing; previously engaged arm 84; when the 4' J was moved upwardiyl In. 8881. 3" normal position pawl 82 jiuiis arm $54 the edge of plate 85 ante? the pawl ieasod. T he arm 84 is semiared to izhe member 86, which is rotatabi y ii'xoiiiiaed on a shaft 87. Vihen the member 8555 pulled eroumi by the pawl 82 acting upon the aro'i iii-,the pawi 441- is moved out of ongagen i with the teeth of the Wheel 9, thus pemiittingsaid Wheel to return io normal position on; (or action of the spring 24. The spring 88, having oi'ie end fastened 10 a pin on the frame and the oiher ho a lever" 85 to the member 86, holds the pew? out engagement with the teeth 'Wheei. m i! 5; lug; 91 fastene to said wheel e U said pawl. Lug $1 striking a forces said pawl back into eiigagemr 1%, with the teeth of Wheei 9 and. the switeh- LS Ready for another Cali,

lihe switch mwhanism of (his iOWI'l CCX!i'1Qi28(i iii a circuit to as e although ii oiwiis not limiieci to this;

n hne swi'seh martini to oe engegeii o z i o v [9, Assuming that t m suheoifihs at tion i desires Bonne i" m with suoevi'iher, say at subsmfiion t opei'flion wiii he as follows, Th ah- 33011 removal oi his ireceivei 'om rook, Wiii aoeoinatioaiiy have he *4? with the movabie uoniaos ii weibimo iimnne'r taro: 511, on of i he iine SWl'Q FOiiG/v i'he line (-i'iiitaets, line s A. i

relay iii-'33, ftei" removing his ajigmratus may he eoiii I1 n the F-umtiouhdr instance, We Wiii voiitrts secomi group conia'eis are sou ii which pwo These hioh no switc' 4"3 Wiper in first posiiioixlay o a: ezzergizoiion in complete a i'iienit 'h m through the more emi front @ontaei 'o \"iii ik Wiper 12! in its first its position we esozz tement magnet o'i'oimfieii haiiieiy. The ieia 's and 3124:

hot/h no; of the siow fi'eiieese type, Wiii lQii-H-l their armainues afstiraoted (Em-mg the The stepping magiieix geond to the impuises sending of impu e), however, wsii 1- resnitinfl" from the nine; and dosing of we mot 123. step the toothed wheei Q 9 i with it Hie toothed Wheel 1"? and the 2 around x;

life she e ii'i'ioo'isc rom the he Belay 11f Wiii T 11 open ihe C1 5min he the suoseriher A the 'oei'aai manner so no. the i'eqi niimher of impulses to mo e tho brushes 2, 9) into poet "age contacts in %-he I i. i. a

circuit of the escapcnient magnet 128. T e armature of the cscapcmeot magnet 1% ,c moi all of the side-switch brus ics t to their second position.

the sicleitch win er 132 is ino eil to i' EQOIHl pOSlLlUIl, a circuit will be coinplctcii for the stepping magnet 60, which may be traced from ground through. armature and contact of escapenient magnet 128, side-switch wiper 132 (second position), a contact 133 at armature 61 of stepping magnet 50, armature 61 and through the winding of magnet 60 to grounded battery. This ci1- cuit will exist so long as magnet 128; is not ener r. Upon the energization of map; on 60 the arm 63 secured. to the arms-- ture 61 causes the pawl armature 70 of magnct i i to be moved into cgenient with the teem of toothed Wheel 17' to act as a holding The magnet 66' upon cnergizai'aion L s the toot-heal Wheel 17 around. in a directioc. oopositc to that which it had. been pre- 2" stepped y the magnet The anagzepping the soother Wheel 17 causes to lie-moved l'i'pYv'il-ldly, thus dis- 7 g; the toothed Wheel 9 from the Wheel 1? anrlmoving'g ihc brushes 2, I ally into engagement with the desired final. any of the contacts of ihis v r been taken for use by another switch, -e will be battery potential on the test contacts 142, so that esccpemeut magnet will not be energized. The stepping operation will be continued until the brushes 2; 2 rest on a set of contacts, the contact 1&2

or which 'rouncied. When. this'occurs, a

circuit for the escapement magnet 128 will be closed, which may be traced through the grounded contact 142, lower brush 2, si.(le-- switch. wiper 12'? (second position), winding of magnet 128 to grounded battery. Escape- 128 upon energization attracts thus opening the circuit of magnet and moving all of the S lvio-switch wipers into position 3. it should be noted that the teeth on the escape wheel for escapemcnt magnet 1:28 are so arran 'ed that the Wipers are moved from position Ii to upon (leiinergiz 5101i and from to 3 upon energiaation.

merit magnet its armature,

lr third position the Wipers 11%"), 1'1? connect the ci uit of station A wit 1 contacts H0, ME leading through the two upper bruslies 2, E2 /Vhcn conversation has been completed and the succeeding switches have rciiurned to normal position, a grtmml will he piece-cl upon brush 14-2, cans 5: release anal return of the switch to normal iosition. The circuit may be traced from grounded contact 14, lower brush 2, sideswitch wipcr F38 (thir l position), oli' normal contact 99,. i'ilffld f magnet '11, to grounded battery. The attraction of arnniture of magnet 71 releases iiOO'hllGfl Wheel 17', which when it has reached normal position, causes, by the systom of lovers lic'reinheiluc described, ihe pawl ia-l to be disengaged from the tooth of toothed Wheel 9, allowing it to return to normal position. The return of toothed wheel 17 to normal position causes the brushes 2, to be radially witlulrasyn from the contacts, and the return of the toothed wheel 9 causes the brushes to be rotated back to their normal position.

From the description of the invention it obvious that the switching mechanisms are compact in form and may be mounted one over the other, thus economizing in space and providing apparatus which will select contacts accurately and rapidly.

("i licit is claimed is:

1. The combination with a plurality of terminal banks arranged vertically, of a plurality of superimposed switches each haying; a set of brushes movable in a horizontal plane, sail brushes being arran to select a bank by a rotative movement a to select a terminal in the selected bank by a radial movement.

Q. The combination with a phirality of panel type n'niltiplc terminal hanks arranged vertically and in a circle, the faces of saicl banks a raiiial plane with respect to said circle, of a plurality of superimposed switches each having a set of brushes pivoted at the center of said circle aurl mo /able in a horizontal plane. saitl brushes being arrau god to select a bank by a rotatire increment, and to select a tern'iinal in saicl bank by a radial movement.

I 3. in an automatic switch, a shaft, :1 brush carriage movably mounted thereupon, brushes mounted on said carriage on a plane at an angle to the plane of said carriage, a

plurality of groups of contacts, said groups of contacts being in separate banli's anal air-- ranged to extend radially from the shaft, means to rotate saicl brushes to select a group of contacts, and means to radially, move said brushes to select a desired contact in the solectcc'i group.

In an automatic switch, a shaft, a brush carriage movably mounted u pon saicl shaft, brushes for said brush carriage mounted in a plane at an angle to the plane oi said carriage, a plurality of groups of contacts in a horizontal plane, each or ssh. groups of contacts extending; rariially from the axis of rotation of said shaft anti lying in the same plane the plane of saifl, brushes, means for rotating said brush carriage to cause said brushes to select a group of contacts, means for raclially moving said brush carriage to cause said brushes to select a desired contact in the solectcil group of contacts, anal means fo returning saial brush carriage to normal positi on.

21 said shaft, 5 set- 0'1 *rushcs muuntefi 01rsaid toothed wheel and. arrangei 10 be mavad radial 7 wiizh t0 the shaft, an essay men't mechanism, means controlling said escapemenn mechanism for causing said set of brushcs w be rotated with said. tocthed "WhGOL; andmans for holding said'toothed .vheei Stationary radizflly.

In Witness wile waving said brushes Ii hereunto subscribe 1i moi mi @ctnber, A; 33%,

L. MGQUAL 

